Pipeline will execute a callback whenever an run-time error has happened....

webkit/glue/webmediaplayer_impl.h

 // Copyright (c) 2008-2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be found
 // in the LICENSE file.
 //
 // Delegate calls from WebCore::MediaPlayerPrivate to Chrome's video player.
 // It contains PipelineImpl which is the actual media player pipeline, it glues
 // the media player pipeline, data source, audio renderer and renderer.
 // PipelineImpl would creates multiple threads and access some public methods
 // of this class, so we need to be extra careful about concurrent access of
 // methods and members.
@@ skipping 88 matching lines @@
 
     // Public methods called from WebMediaPlayerImpl.
     void Paint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
     void SetSize(const gfx::Rect& rect);
     void Detach();
 
     // Public methods called from the pipeline via callback issued by
     // WebMediaPlayerImpl.
     void PipelineInitializationCallback();
     void PipelineSeekCallback();
+    void PipelineErrorCallback();
 
    private:
     // Invoke |webmediaplayer_| to perform a repaint.
     void RepaintTask();
 
     // Notify |webmediaplayer_| that initialization has finished.
     void PipelineInitializationTask();
 
     // Notify |webmediaplayer_| that a seek has finished.
     void PipelineSeekTask();
 
+    // Notify |webmediaplayer_| that a pipeline error has been set.
+    void PipelineErrorTask();
+
     // The render message loop where WebKit lives.
     MessageLoop* render_loop_;
     WebMediaPlayerImpl* webmediaplayer_;
     scoped_refptr<VideoRendererImpl> video_renderer_;
 
     Lock lock_;
     int outstanding_repaints_;
   };
 
   // Construct a WebMediaPlayerImpl with reference to the client, and media
@@ skipping 76 matching lines @@
   // |main_loop_| is being destroyed and we can stop posting repaint task
   // to it.
   virtual void WillDestroyCurrentMessageLoop();
 
   void Repaint();
 
   void OnPipelineInitialize();
 
   void OnPipelineSeek();
 
+  void OnPipelineError();
+
  private:
   // Helpers that set the network/ready state and notifies the client if
   // they've changed.
   void SetNetworkState(WebKit::WebMediaPlayer::NetworkState state);
   void SetReadyState(WebKit::WebMediaPlayer::ReadyState state);
 
   // Destroy resources held.
   void Destroy();
 
   // Getter method to |client_|.
@@ skipping 26 matching lines @@
   WebKit::WebMediaPlayerClient* client_;
 
   scoped_refptr<Proxy> proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_WEBMEDIAPLAYER_IMPL_H_